Winner
Updated November 2026
Data from the official Fibaro and Shelly sites.
2026 verdict
As a water leak sensor for a Z-Wave household, the Fibaro Flood Sensor (Z-Wave) beats the Shelly Flood on rating, battery life and onboard hardware.
It adds tilt and tamper detection plus an on-device alert sound and light that the Shelly has none of. The Shelly Flood answers with a lower price, a longer warranty, and a wider set of integrations out of the box, reaching Google Home on top of Samsung SmartThings and Home Assistant, all over its own direct Wi-Fi connection with no separate hub needed. Both sensors double as temperature monitors alongside leak detection. Choose the Fibaro Flood Sensor (Z-Wave) if you run a Z-Wave setup and want tamper alerts with a local siren; lean toward the Shelly Flood if you want a cheaper Wi-Fi-native sensor with Google Home support and a longer warranty.
Works with
Connectivity
vs
3% OFF
€25.40
€26.09
Works with
Connectivity
- Wi-Fi 2.4 GHz
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The biggest differences
Where these two are furthest apart, and by how much.
- Warranty2×Shelly Flood2 years vs 1 year
- Battery Life+33%Fibaro Flood Sensor (Z-Wave)2 years vs 1.5 years
| Feature | Fibaro Flood Sensor (Z-Wave) | Shelly Flood | Winner |
|---|---|---|---|
| Price | $60.12 | €25.40 | Shelly Flood |
| Rating | 4.3 | 3.8 | Fibaro Flood Sensor (Z-Wave) |
| Warranty | 1 year | 2 years | Shelly Flood |
| Battery Life | 2 years | 1.5 years | Fibaro Flood Sensor (Z-Wave) |
| Integrations | Samsung SmartThings, Home Assistant | Google Home, Samsung SmartThings, Home Assistant | Shelly Flood |
| Sensors | Water Leak, Temperature, Tilt | Water Leak, Temperature | Fibaro Flood Sensor (Z-Wave) |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Fibaro Flood Sensor (Z-Wave) |
| On Device Alert Sound | YES | NO | Fibaro Flood Sensor (Z-Wave) |
| On Device Alert Light | YES | NO | Fibaro Flood Sensor (Z-Wave) |
| Connectivity | Z-Wave | 2.4 GHz WiFi | Tie |
| Local Control | YES | YES | Tie |
What the differences mean
On-device alarm, tilt and tamper
The Fibaro Flood Sensor (Z-Wave) sounds and lights an alert on the device itself and adds tilt sensing with tamper alerts. The Shelly Flood has none of these, its warnings live entirely in the app and its hub notifications.
Warranty
Shelly backs the Flood for two years. Fibaro covers its Flood Sensor for one.
Whether a hub is required
The Fibaro Flood Sensor (Z-Wave) has no Wi-Fi, Bluetooth, Zigbee or Thread radio of its own, so it only works through a Z-Wave hub or controller. The Shelly Flood joins 2.4GHz Wi-Fi directly, with no separate hub to add.
Google Home support
The Shelly Flood reaches Google Home directly, on top of Samsung SmartThings and Home Assistant. The Fibaro Flood Sensor (Z-Wave) reaches SmartThings and Home Assistant through its Z-Wave hub, but has no Google Home path.
Wired backup power
The Fibaro Flood Sensor (Z-Wave) can be connected to an external 12/24V DC source, turning its battery into an emergency backup instead of the primary power. The Shelly Flood has no wired power option at all; it runs on battery only, and that CR123A cell is not included in the box.
Which one to buy if
- you want a local audible alarm plus tamper detection built into the sensor itself
The Fibaro Flood Sensor (Z-Wave) has an on-device alert sound, light and tamper alert; the Shelly Flood has none of these.
- you want the cheaper option and specifically need Google Home support
The Shelly Flood costs less and reaches Google Home directly, which the Fibaro Flood Sensor (Z-Wave) does not support.
- you already run a Z-Wave hub and want tilt sensing added to leak detection
The Fibaro Flood Sensor (Z-Wave) bundles tilt and tamper sensing that the Wi-Fi-only Shelly Flood does not offer.
- you want the sensor to run on constant wired power with the battery only as backup
The Fibaro Flood Sensor (Z-Wave) supports an optional external 12/24V connection; the Shelly Flood is battery only.
Winner
$60.12
- + Rating: 4.3
- + Battery Life: 2 years
- + Sensors: Water Leak, Temperature, Tilt
- - Price: $60.12 vs €25.40
- - Warranty: 1 year vs 2 years
3% OFF
€25.40
€26.09
- + Price: €25.40
- + Warranty: 2 years
- + Integrations: Google Home, Samsung SmartThings, Home Assistant
- - Rating: 3.8 vs 4.3
- - Battery Life: 1.5 years vs 2 years
What owners say
Fibaro Flood Sensor (Z-Wave) owners describe pairing it in seconds once their Z-Wave hub is in place, across SmartThings, Home Assistant, Domoticz, Homey and Jeedom controllers alike, and value the tilt sensor and tamper alerts as an extra layer they don't get from a plain leak puck, alongside the option to add external 12/24V power so the battery becomes pure backup. Their complaints are the hub dependency itself, no Wi-Fi, Bluetooth, Zigbee or Thread radio exists on the device, plus a low-battery alert that isn't a confirmed feature and a small number of units arriving with cosmetic scratches or an already-low cell. Shelly Flood owners point to how many platforms it reaches straight out of the box, Google Home and SmartThings alongside Home Assistant, and to the price that lets them place a sensor at every water source in the house instead of budgeting for just one or two. Their recurring complaint is that same Wi-Fi link needing a few pairing attempts on some units, with no HomeKit or Matter path at all.
Frequently Asked Questions
Which is the better water leak sensor, the Fibaro Flood Sensor (Z-Wave) or the Shelly Flood?
The Fibaro Flood Sensor (Z-Wave) wins overall thanks to a higher rating, longer battery life, and extra tilt and tamper sensing with a local alarm. The Shelly Flood pushes back with a lower price, a longer warranty, and broader smart home integrations.
What is the biggest difference between the Fibaro Flood Sensor (Z-Wave) and the Shelly Flood?
Connectivity and onboard alerting. The Fibaro Flood Sensor (Z-Wave) needs a Z-Wave hub but adds a local alert sound, light, tilt sensing, and tamper alerts, while the Shelly Flood connects directly over Wi-Fi with no hub needed but skips any on-device alarm.
Which sensor has a local alarm or tamper detection?
Only the Fibaro Flood Sensor (Z-Wave). It includes both an on-device alert sound and light along with tamper alerts tied to its tilt sensor, while the Shelly Flood has no local siren or tamper detection at all.
Which one integrates with more smart home platforms?
The Shelly Flood integrates with Google Home, Samsung SmartThings, and Home Assistant right out of the box over Wi-Fi. The Fibaro Flood Sensor (Z-Wave) reaches SmartThings and Home Assistant too, once paired to a Z-Wave hub, but has no Google Home path.
Who should buy the Fibaro Flood Sensor (Z-Wave)?
Buy it if you already have a Z-Wave hub and want a higher-rated sensor with tilt sensing, tamper alerts, and a local siren and light.
Who should buy the Shelly Flood?
Choose it if you want a lower-cost, hub-free Wi-Fi sensor with a longer warranty and native support for Google Home and SmartThings.
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